. tonight we learned more abouttheamericanpresidents,who will travel to south africa. of course, president obama will be among the mourners along with mrs. obama who met mandela shortly after becoming first lady. president bush and laura bush have been invited to travel with the obamas, and former president clinton and hillary clinton will travel to the tribute for nelson mandela. from south africa we hear from one of his friends who described those final visits with the man he revered. abc's byron pitts from outside mandela's home. >> reporter: nowhere has admiration for nelson mandela been stronger, expressed more passionately than a few feet from his doorstep outside his home where the beloved statesman took his last breath. >> by singing and dancing, it's a way of showing our appreciation. >> he represents this country. >> reporter: nelson mandela will be laid to rest in grand style. tuesday, a memorial service like the world has never seen. some 95,000 people packed inside the stadium. wednesday through friday the former president will lay in state in pretoria, the nation's